Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
TEMPORARY CONTACT
Do not rush to throw scribbled stem from a ballpoint pen from his writing site with a remote bulb makes a great connector for the electronic components required during the setup of...
HOMESTEAD TRUCK
I've been a longtime reader and a regular subscriber of the magazine "modelist-Konstruktor". For nearly forty years, not only got acquainted with the machines and mechanisms for...
